<?php

    function init_chart_region( $entity_name, &$x_axis, &$y_axis, &$list_provinces, &$counters_provinces ) {
        $x_axis = $list_provinces;
        $y_axis = $counters_provinces;
    }

    function init_chart_region_years( $entity_name, &$x_axis, &$y_axis, &$all_entities, &$query ) {
        $year_start = ( int )$query['filter_since_year'];
        $year_end = ( int )$query['filter_until_year'];

        $x_axis = array();
        $y_axis = array();

        for( $i = $year_start; $i <= $year_end; $i++ ) {
            $x_axis[] = $i;
            $y_axis[] = 0;
        }

        foreach( $all_entities as $entity ) {
            $year = explode( '-', $entity[$entity_name]['joined'] );
            $year = $year[0];

            $y_axis[ $year - $year_start + 543 ]++;
        }
    }

    function init_chart_region_months( $entity_name, &$x_axis, &$y_axis, $year, &$all_entities ) {
        $x_axis = array();
        $y_axis = array();
        $months = Configure::read( 'MONTHS' );

        // the months in bootstrap.php are indexed, starting at 1... Next time I don't listen to Arm anymore ;(
        foreach( $months as $month ) {
            $x_axis[] = $month;
            $y_axis[] = 0;
        }

        foreach( $all_entities as $entity ) {
            $month = explode( '-', $entity[$entity_name]['joined'] );
            // work only on selected year
            if( $month[0] != $year ) {
                continue;
            }

            $month = $month[1];

            $y_axis[ $month - 1 ]++;
        }
    }

    if( !empty( $this->request->query['filter_since_year'] ) ) {
        // two years given, show the years on the X axis
        if( !empty( $this->request->query['filter_until_year'] ) ) {
            // invalid years request -> reset to normal chart
            if( ( int )$this->request->query['filter_since_year'] <= ( int )$this->request->query['filter_until_year'] ) {
                init_chart_region_years( $entity_name, $x_axis, $y_axis, $all_entities, $this->request->query );
            } else {
                init_chart_region( $entity_name, $x_axis, $y_axis, $list_provinces, $counters_provinces );
            }
            // one year given, show the months
        } else {
            $year = ( int )$this->request->query['filter_since_year'] - 543;
            init_chart_region_months( $entity_name, $x_axis, $y_axis, $year, $all_entities );
        }
    } else {
        init_chart_region( $entity_name, $x_axis, $y_axis, $list_provinces, $counters_provinces );
    }

    $options['x_axis'] = $x_axis;
    $options['y_axis'] = $y_axis;
    echo $this->element( 'Pages/Charts/horizontal-chart', $options );
?>
<div class="container frontend-content">
    <?php echo $this->element('Pages/map-nav', array('current_entities' => $tab_name)); ?>
    <div class="row">
        <div id="container"></div>
    </div>
</div>